CVE-2023-6449
The Contact Form 7 plugin for WordPress is vulnerable to arbitrary file uploads due to insufficient file type validation in the 'validate' function and insufficient blocklisting on the 'wpcf7_antiscript_file_name' function in versions up to, and…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.73%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
The Contact Form 7 plugin for WordPress is vulnerable to arbitrary file uploads due to insufficient file type validation in the 'validate' function and insufficient blocklisting on the 'wpcf7_antiscript_file_name' function in versions up to, and including, 5.8.3. This makes it possible for authenticated attackers with editor-level capabilities or above to upload arbitrary files on the affected site's server, but due to the htaccess configuration, remote code cannot be executed in most cases. By default, the file will be deleted from the server immediately. However, in some cases, other plugins may make it possible for the file to live on the server longer. This can make remote code execution possible when combined with another vulnerability, such as local file inclusion.
- CVSS 3.1
- 7.2 HIGHCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 1.73% probability · 76th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-434
- Affected
- rocklobster/contact form 7
- Source
- security@wordfence.com
References
- https://contactform7.com/2023/11/30/contact-form-7-584/Release Notes
- https://github.com/rocklobster-in/contact-form-7/compare/v5.8.3...v5.8.4Patch
- https://plugins.trac.wordpress.org/browser/contact-form-7/tags/5.8.3/includes/formatting.php#L275Product
- https://plugins.trac.wordpress.org/changeset/3003556/contact-form-7Patch
- https://www.wordfence.com/threat-intel/vulnerabilities/id/5d7fb020-6acb-445e-a46b-bdb5aaf8f2b6?source=cveThird Party Advisory
- https://contactform7.com/2023/11/30/contact-form-7-584/Release Notes
- https://github.com/rocklobster-in/contact-form-7/compare/v5.8.3...v5.8.4Patch
- https://plugins.trac.wordpress.org/browser/contact-form-7/tags/5.8.3/includes/formatting.php#L275Product
- https://plugins.trac.wordpress.org/changeset/3003556/contact-form-7Patch
- https://www.wordfence.com/threat-intel/vulnerabilities/id/5d7fb020-6acb-445e-a46b-bdb5aaf8f2b6?source=cveThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.